Mo. Rev. Stat. § 538.228
Any physician licensed under chapter 334 who provides medical treatment to a patient at a city or county health department organized under chapter 192 or chapter 205, a city health department operating under a city charter, a combined city-county health department, or a nonprofit community health center or other nonprofit entity that solely provides free health care services and is qualified as exempt from federal taxation under Section 501(c)(3) of the Internal Revenue Code of 1986, as amended, shall not be liable for any civil damages for acts or omissions unless the damages were occasioned by gross negligence or by willful or wanton acts or omissions by such physician in rendering such treatment or unless the physician maintained, at the time of treatment, liability insurance for such treatment, provided that such treatment:
For purposes of this section, a physician covered under the state legal expense fund under section 105.711 shall not be construed as maintaining liability insurance coverage under this section.
§ 538.228, RSMo